i dont have the 7506 but even the z1000 (i didnt have too much listening time on that either, just got it along with the tbse) doesnt even seem to have a really 3d soundstage. im pretty positive that my dt990 has larger soundstage but thats an open back headphone. for you, i say, go for tbse.

OK--looking back I think that it's mentioned in your third post. Points are that open cans almost always have a sound stage advantage and the only cans OP was considering (for good reason with regard to his needs I suspect) were closed cans.

I believe the ZX700 and 7510 are the same aside the cable being coiled on the 7510. If so I have the ZX700 at home and have listened to the KOSS TB's. the TB had better mids in my opinion and is tighter and more accurate all round. The ZX700 is a bit more bassy and V shaped signature wise than the Koss but not as V shaped as the z1000/7520 headphones, it is definitely more comfortable than the stock earpads of the Koss though and much easier to drive straight from portable source.

I believe the ZX700 and 7510 are the same aside the cable being coiled on the 7510. If so I have the ZX700 at home and have listened to the KOSS TB's. the TB had better mids in my opinion and is tighter and more accurate all round. The ZX700 is a bit more bassy and V shaped signature wise than the Koss but not as V shaped as the z1000/7520 headphones, it is definitely more comfortable than the stock earpads of the Koss though and much easier to drive straight from portable source.

i dont find my z1000 v shape at all... im guessing you also have a z1000?